Next Article in Journal
Micro-Shaping of Nanopatterned Surfaces by Electron Beam Irradiation
Next Article in Special Issue
Enhanced Throughput for Electrokinetic Manipulation of Particles and Cells in a Stacked Microfluidic Device
Previous Article in Journal
Three-Dimensional Force Measurements During Rapid Palatal Expansion in Sus scrofa
Open AccessArticle

Fabrication of High-Aspect-Ratio 3D Hydrogel Microstructures Using Optically Induced Electrokinetics

1
Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Kowloon, Hong Kong, China
2
State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences (CAS), Shenyang 110016, China
3
Shenzhen Academy of Robotics, Shenzhen 518000, China
4
Department of Power Mechanical Engineering, National Tsinghua University, Hsinchu 300, Taiwan
*
Author to whom correspondence should be addressed.
Academic Editor: Sami Franssila
Micromachines 2016, 7(4), 65; https://doi.org/10.3390/mi7040065
Received: 2 December 2015 / Revised: 4 March 2016 / Accepted: 11 March 2016 / Published: 12 April 2016
(This article belongs to the Special Issue Micro/Nano-Chip Electrokinetics)
We present a rapid hydrogel polymerization and prototyping microfabrication technique using an optically induced electrokinetics (OEK) chip, which is based on a non-UV hydrogel curing principle. Using this technique, micro-scale high-aspect-ratio three-dimensional polymer features with different geometric sizes can be fabricated within 1–10 min by projecting pre-defined visible light image patterns onto the OEK chip. This method eliminates the need for traditional photolithography masks used for patterning and fabricating polymer microstructures and simplifies the fabrication processes. This technique uses cross-link hydrogels, such as poly(ethylene glycol) (PEG)-diacrylate (PEGDA), as fabrication materials. We demonstrated that hydrogel micropillar arrays rapidly fabricated using this technique can be used as molds to create micron-scale cavities in PDMS (polydimethylsiloxane) substrates. Furthermore, hollow, circular tubes with controllable wall thicknesses and high-aspect ratios can also be fabricated. These results show the potential of this technique to become a rapid prototyping technology for producing microfluidic devices. In addition, we show that rapid prototyping of three-dimensional suspended polymer structures is possible without any sacrificial etching process. View Full-Text
Keywords: optically induced electrokinetics; polymer microfabrication; hydrogel microstructures; 3D polymer structures optically induced electrokinetics; polymer microfabrication; hydrogel microstructures; 3D polymer structures
Show Figures

Figure 1

MDPI and ACS Style

Li, Y.; Lai, S.H.S.; Liu, N.; Zhang, G.; Liu, L.; Lee, G.-B.; Li, W.J. Fabrication of High-Aspect-Ratio 3D Hydrogel Microstructures Using Optically Induced Electrokinetics. Micromachines 2016, 7, 65.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop